www.emgu.com/wiki
Same as v_prev pointer in CvSeq

Declaration Syntax
public Seq<T> VPrev { get; set; }
Public Property VPrev As Seq(Of T)
public:
property Seq<T>^ VPrev {
Seq<T>^ get ();
void set (Seq<T>^ value);
}
Assembly:
Emgu.CV (Module: Emgu.CV) Version: 1.5.0.0 (1.5.0.0)